Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B51/00—Testing machines, pumps, or pumping installations
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
  • F04B49/02—Stopping, starting, unloading or idling control
  • F04B49/03—Stopping, starting, unloading or idling control by means of valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
  • F04B49/10—Other safety measures
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
  • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
  • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
  • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
  • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
  • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
  • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
  • F04B9/125—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B2205/00—Fluid parameters
  • F04B2205/09—Flow through the pump
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B2207/00—External parameters
  • F04B2207/70—Warnings
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/0971—Speed responsive valve control
  • Y10T137/1026—Speed change and excess speed valve control

Definitions

• Air-operated reciprocating piston pumps are well known for the pumping of various fluids. Such pumps typically have mechanically or pneumatically operated air valves to control the flow of air to the two sides of the piston. Control of such pumps has traditionally been by monitoring and controlling the resulting fluid flow rather than the pump itself. Prior art devices such as Graco's EXTREME-MIXTM proportioner have monitored the position of the piston for purposes of control.
• the control uses a magnet mounted in the valve cup of the air motor and two reed sensors mounted in the valve cover to monitor the speed and position of the valve.
• a solenoid is mounted on the valve cover and can be commanded to extend a plunger into the valve cup to stop valve movement and therefore the pump from running away (typically caused by the fluid supply being empty.)
• the user interface comprises an LCD and buttons to set up and control the pump.
• the display can be toggled to display cycle rate, flow rate (in various units), total cycles and diagnostic errors.
• Setup parameters can include fluid units (quarts, liters, etc.) and the runaway set point.
• the reed switches and magnets are located so as to detect when the air valve is at the extreme position of each stroke or in transition or both.
• the controller calculates the rate at which the motor is running by counting the opening and closing of the reed switches activated by the varying positions of the air valve.
• the controller compares that rate to a pre-programmed value to determine if the air motor is in a runaway condition. The that condition is present, the controller activates the solenoid preventing changeover which stops the motor. This acts to prevent spilled fluid and/or pump damage.
• Three methods may be used to increase battery life and monitor the solenoid plunger position, two of which use the changing inductance of the solenoid to monitor solenoid movement.
• the controller software monitors the voltage curve of the solenoid as the solenoid is energized. When the solenoid plunger reaches the end of its stroke, the software stops the voltage pulse. In the next embodiment, the controller software monitors the voltage curve of the solenoid as the solenoid is energized. If a voltage spike is not present at the end of the voltage curve (in a fixed amount of time), the controller software will know that the solenoid did not latch and thus did not complete its required movement.
• voltage is measured across the solenoid as a voltage pulse is applied to determine if the current battery voltage level is sufficient to activate the solenoid.
• Figure 1 shows a cross-section of the air valve as part of the instant invention showing the magnets and reed switches.
• Figure 2 shows a detail of the Figure 1 cross-section of the air valve as part of the instant invention.
• Figure 3 shows a cross-section (opposite that of Figure 1) of the air valve as part of the instant invention showing the solenoid.
• Figure 4 shows a view of a pump incorporating the instant invention.
• Figure 5 shows a detail of the user interface of the instant invention.
• Figure 6 shows typical voltage drops over time.
• the controller 12 uses a magnet
• the user interface 28 comprises an LCD display 30 and buttons 32 to set up and control the pump 10.
• the display 30 can be toggled to display cycle rate, flow rate (in various units), total cycles and diagnostic errors. Setup parameters can include fluid units (quarts, liters, etc.) and the runaway set point.
• the reed switches 20 and magnets 14 are located so as to detect when the air valve
• the controller 12 calculates the rate at which the motor 18 is running by counting the opening and closing of the reed switches 20 activated by the varying positions of the air valve 16. The controller 12 then compares that rate to a pre-programmed value to determine if the air motor 18 is in a runaway condition. The that condition is present, the controller 12 activates the solenoid 24 preventing changeover which stops the motor 18. This acts to prevent spilled fluid and/or pump damage. Three methods may be used to increase battery life and monitor the solenoid plunger position, two of which use the changing inductance of the solenoid to monitor solenoid movement.
• the controller 12 software monitors the voltage curve of the solenoid 24 as the solenoid is energized. When the solenoid 24 plunger reaches the end of its stroke, the software stops the voltage pulse.
• the controller software monitors the voltage curve of the solenoid 24 as the solenoid 24 is energized. If a voltage spike is not present at the end of the voltage curve (in a fixed amount of time), the controller software will know that the solenoid 24 did not latch and thus did not complete its required movement.
• voltage is measured across the solenoid 24 as a voltage pulse is applied to determine if the current battery voltage level is sufficient to activate the solenoid 24.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Control Of Positive-Displacement Pumps (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
• Magnetically Actuated Valves (AREA)
• Lubrication Of Internal Combustion Engines (AREA)
• Electromagnetic Pumps, Or The Like (AREA)
• Sampling And Sample Adjustment (AREA)
• Reciprocating Pumps (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=37709139

Family Applications (1)

Country Status (15)

Families Citing this family (20)

Family Cites Families (39)

• 2006
  • 2006-07-26 ES ES06788526T patent/ES2363717T3/es active Active
  • 2006-07-26 RU RU2008107702A patent/RU2394171C2/ru not_active IP Right Cessation
  • 2006-07-26 UA UAA200802595A patent/UA93051C2/uk unknown
  • 2006-07-26 BR BRPI0613879-9A patent/BRPI0613879A2/pt not_active IP Right Cessation
  • 2006-07-26 KR KR1020087002196A patent/KR101190316B1/ko not_active Expired - Fee Related
  • 2006-07-26 WO PCT/US2006/028989 patent/WO2007016151A2/en not_active Ceased
  • 2006-07-26 PL PL06788526T patent/PL1910678T3/pl unknown
  • 2006-07-26 AU AU2006275866A patent/AU2006275866B2/en not_active Ceased
  • 2006-07-26 AT AT06788526T patent/ATE506605T1/de not_active IP Right Cessation
  • 2006-07-26 US US11/996,410 patent/US8066491B2/en not_active Expired - Fee Related
  • 2006-07-26 EP EP20060788526 patent/EP1910678B1/de not_active Not-in-force
  • 2006-07-26 JP JP2008524095A patent/JP4933545B2/ja not_active Expired - Fee Related
  • 2006-07-26 DE DE200660021430 patent/DE602006021430D1/de active Active
  • 2006-07-26 CN CN2006800278330A patent/CN101233322B/zh not_active Expired - Fee Related
  • 2006-07-27 TW TW095127538A patent/TWI365944B/zh not_active IP Right Cessation

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